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LTC3124 Datasheet(PDF) 1 Page - Analog Devices |
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LTC3124 Datasheet(HTML) 1 Page - Analog Devices |
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1 / 36 page  LT3120 1 Rev. 0 For more information www.analog.com Document Feedback TYPICAL APPLICATION FEATURES DESCRIPTION 26V, 9A Low-IQ CC/CV Monolithic Buck-Boost Converter The LT®3120 is a high efficiency 26V monolithic buck- boost converter. Extensive feature integration and very low resistance internal power switches minimize the total solution footprint for even the most demanding applica- tions. A proprietary 4-switch PWM architecture provides seamless low noise operation from input voltages above, equal to, or below the output voltage. External frequency programming as well as synchroniza- tion using an internal PLL enable operation over a wide switching frequency range of 400kHz to 2MHz. The wide 2.5V to 26V input range is well suited for operation from unregulated power sources including battery stacks and backup capacitors. After start-up, operation is possible with input voltages as low as 500mV. Other features include, output short-circuit protection, thermal overload protection, less than 3µA shutdown cur- rent, power good indicator, Burst Mode operation, and maximum power point control. The LT3120 is offered in thermally enhanced 28-lead 4mm × 5mm LQFN package. Wide Input Range 750kHz 5V Regulator APPLICATIONS n Input Voltage Range: 2.5V to 26V n 0.8V to 24V Output Voltage Range n High Output Current n 6.5A with VOUT = 5V, VIN > 6V n 3A with VOUT = 5V, VIN = 3V n 6.5A with VOUT = 12V, VIN > 14V n 4 A with VOUT = 12V, VIN = 9V n Ultralow Noise Buck-Boost Architecture n Programmable Output Current Limit n Programmable Frequency Range: 400kHz to 2MHz n Accurate Enable Comparator Threshold n Burst Mode® Operation, No-Load IQ = 35µA n Current Mode Control n External Clock Synchronization n Maximum Power Point Control n 28-Lead 4mm × 5mm LQFN Package n RF Power Supply n USB Power Delivery n System Backup Power Supply n 1-Cell to 5-Cell Lithium Battery Powered Products n Wide Input Range Power Supply n Lead Acid to 12V Regulator All registered trademarks and trademarks are the property of their respective owners. Efficiency, VOUT = 5V, fSW = 750kHz PWM Burst Mode OPERATION VIN = 3V VIN = 12V VIN = 20V OUTPUT CURRENT (A) 100µ 1m 10m 100m 1 10 10 20 30 40 50 60 70 80 90 100 3120 TA01 3.3µH 0.22µF 0.22µF 4.7µF 105k 10µF 22nF 536k 102k 56.2k 680pF VIN PVIN SYNC/MODE VCC ISP GND VC FB PVOUT SW1 SW2 BST1 BST2 RT PGOOD EN/UVLO PROG MPPC BST3 ISN LT3120 150µF VIN VOUT 2.5V to 26V 5V VIN = 2.5V; IOUT =1.25A; EFFICIENCY = 85% VIN = 6.0V; IOUT = 6.5A; EFFICIENCY = 86% 3120 TA01a |
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